Synonyms for UNCERTAIN: volatile, unpredictable, changeful, unstable, inconsistent, variable, unsettled, capricious; Antonyms of UNCERTAIN: certain, constant, stable, predictable, steady, invariable, unchanging, unchangeable

The meaning of UNCERTAIN is not known beyond doubt : dubious. How to use uncertain in a sentence.

UNCERTAIN meaning: 1. not knowing what to do or believe, or not able to decide about something: 2. not known or…. Learn more.

UNCERTAIN definition: 1. not knowing what to do or believe, or not able to decide about something: 2. not known or…. Learn more.

To be uncertain is to be unsure of something. Also, uncertain things are undecided, unknown, or doubtful in some way. If you're certain of something, you're sure of it. When you're uncertain, …